Programming and human interface design are separate skills, and people good at both are rare.

编程和界面设计是两种不同的技能，两者都精通的人是很少的。

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Therefore, the human interface device has a vast potential market.

因此，人机接口设备有巨大的应用市场。

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Therefore, the human interface device has a vast potential market.

因此，人机接口设备有巨大的应用市场。

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